Abstract: A system and method is provided for an at least partially variable valve drive in an internal combustion engine. In one example, the at least partially variable valve drive comprises a hydraulically adjustable actuating device which may be charged with pressurized oil via an oil pressure line which branches off from an oil circuit.

Abstract: An internal combustion engine is disclosed that has a cylinder block with multiple cylinders, a bridge between adjacent cylinders, a cooling slot in the bridge, and a water jacket portion in the cylinder block. A cylinder head is coupled to the cylinder block which has a first cooling passage fluidly coupling the cooling slot and the water jacket portion in the cylinder block, a water jacket portion in the cylinder head, and a second cooling passage in the cylinder head fluidly coupling the cooling slot with the water jacket portion in the cylinder head. A cylinder head gasket is arranged between the cylinder head and the cylinder block which has a first orifice in the cylinder head gasket cooperating with the first cooling passage a second orifice in the cylinder head gasket cooperating with the second cooling passage.

Abstract: The disclosure relates to a control valve for a medium circuit of an internal combustion engine, in particular to a thermostat of a coolant circuit of the internal combustion engine. The control valve includes a valve housing, an expansible material element arranged in a valve body, an energy accumulator having an abutment element, a valve seat, and at least one locking element arranged on the abutment element, each locking element having a counter-latching face. The control valve has a first position wherein the counter-latching face of each locking element is in a non-positive connection with a corresponding latching face of the valve housing in order to force the control valve into a mechanically blocked, forced-open position, the latching face being formed by means of an opening edge in the valve housing. This position may enable a quick and reliable initial filling or refilling of the coolant circuit.

Abstract: The disclosure relates to an internal combustion engine with a cooling circuit having a water jacket portion in the cylinder block and a water jacket portion in the cylinder head which has an intake portion and an exhaust portion. Flow from the intake and exhaust portions mix in an outlet housing which has a cylinder head outlet thermostat. A coolant pump provides flow to a first branch to the exhaust portion and a second branch to the water jacket portion in the cylinder block. A block thermostat is located in the second branch downstream of the coolant pump and upstream of the water jacket portion in the cylinder block. The intake portion of the water jacket portion in the cylinder head is fluidly coupled to the water jacket portion in the cylinder block.

Abstract: An internal combustion engine is provided. The internal combustion engine includes a cylinder block having a cooling jacket and a cylinder head having two cooling jackets. In one example, the internal combustion engine may be operated so as to reduce engine friction and emissions during cold engine starts.

Abstract: The disclosure relates to an internal combustion engine with a cooling circuit having a water jacket portion in the cylinder block and a water jacket portion in the cylinder head which has an intake portion and an exhaust portion. Flow from the intake and exhaust portions mix in an outlet housing which has a cylinder head outlet thermostat. A coolant pump provides flow to a first branch to the exhaust portion and a second branch to the water jacket portion in the cylinder block. A block thermostat is located in the second branch downstream of the coolant pump and upstream of the water jacket portion in the cylinder block. The intake portion of the water jacket portion in the cylinder head is fluidly coupled to the water jacket portion in the cylinder block.

Abstract: An internal combustion engine is disclosed that has a cylinder block with multiple cylinders, a bridge between adjacent cylinders, a cooling slot in the bridge, and a water jacket portion in the cylinder block. A cylinder head is coupled to the cylinder block which has a first cooling passage fluidly coupling the cooling slot and the water jacket portion in the cylinder block, a water jacket portion in the cylinder head, and a second cooling passage in the cylinder head fluidly coupling the cooling slot with the water jacket portion in the cylinder head. A cylinder head gasket is arranged between the cylinder head and the cylinder block which has a first orifice in the cylinder head gasket cooperating with the first cooling passage a second orifice in the cylinder head gasket cooperating with the second cooling passage.

Abstract: The invention relates to a cooling strategy for an internal combustion engine (1) which has at least one cylinder head (2) and an associated cylinder block (3). A coolant flows in a coolant circuit (4), with at least one control element (6, 7, 8, 9) being assigned to the coolant circuit (4). During a warmup of the internal combustion engine, in successive phases, the coolant flow is conducted to separate cooling regions by the control elements (6, 7, 8, 9), wherein in an operating mode at operating temperature which follows the warmup, the coolant flow is conducted to separate cooling regions by the control elements (6, 7, 8, 9) taking into consideration the operating states of the internal combustion engine.

Abstract: The invention relates to a cooling strategy for an internal combustion engine (1) which has at least one cylinder head (2) and an associated cylinder block (3). A coolant flows in a coolant circuit (4), with at least one control element (6, 7, 8, 9) being assigned to the coolant circuit (4). During a warmup of the internal combustion engine, in successive phases, the coolant flow is conducted to separate cooling regions by the control elements (6, 7, 8, 9), wherein in an operating mode at operating temperature which follows the warmup, the coolant flow is conducted to separate cooling regions by the control elements (6, 7, 8, 9) taking into consideration the operating states of the internal combustion engine.